中文题目: 单频纳秒脉冲激光中心频率实时监测技术
外文题目: Real-Time Monitoring Technology for Center Frequency of Single-Frequency Nanosecond Pulse Laser
作者: 陈晓; 谢小兵; 谢伟; 李世光; 马秀华; 朱小磊; 刘继桥; 陈卫标
刊名: 中国激光
年: 2017 卷: 44 期: 11 文章编号：1101003
中文关键词:
激光器; 脉冲激光; 中心频率; 拍频; 频率稳定性
英文关键词:

lasers; pulse laser; center frequency; beat frequency; frequency stability
中文摘要:
基于光学外差法,设计并搭建了一套脉冲激光中心频率实时监测系统。频率特性已知的连续光经移频后与待测的单频纳秒脉冲光发生拍频,用光电探测器和数据采集卡记录合成光强信号,分析拍频信号的频谱,即可获取待测光的中心频率信息。实验用一台连续单频输出1.57mum激光器作为参考光源,采用移频、斩波、自拍频的方法对测试系统的测试速率和测试精度进行了评估,得出该系统的响应时间为6ms。对于脉宽为30ns左右的激光脉冲,采样率为2GSa·s~(-1)时,测试系统的均方根误差不超过0.07MHz。

英文摘要:
A real-time monitoring system for center frequency of pulse laser is designed and built based on the optical heterodyne method.The single-frequency nanosecond pulse laser to be measured is mixed with a frequency-shifted continuous reference beam whose spectrum characteristics are known,and a light intensity signal is generated,which is then recorded by aphotodetector and a data acquisition card.The center frequency information of the pulse laser can be calculated according to the spectrum of the beat signal.Measurement rate and precision of this system are evaluated through the method of frequency shifting,chopping and self-heterodyne,which uses a 1.57mum continuous single-frequency laser as a reference beam.Experimental results show that the response time of the system is 6ms,and the root-mean-square error is less than 0.07MHz when the width of laser pulse is around 30ns and the sampling rate is 2GSa·s~(-1).


文献类型: 期刊论文
正文语种: Chinese
收录类别: CSCD
DOI: 10.3788/CJL201744.1101003


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